question on BCA upper assembly

[tdbru]

Thanks A5.

quick question, why would the barrel nut need replacing? just curious. it's steel. the upper is of course aluminum. i would assume grossly over torquing the barrel nut will destroy the upper threads long before the barrel nut threads are destroyed since Steel is typically much tougher/stronger than Aluminum. i was assuming when i get this apart that if something needs replacing it would be the upper before the barrel nut. hopefully a little heat will work wonders tonight.
thanks,
-tdbru